Today, VA Secretary Robert McDonald announced a massive overhaul of the Veterans Affairs. It follows a scandal that was uncovered by CNN Senior Investigative Correspondent Drew Griffin. For a year, Drew has been reporting on veterans waiting months for care at VA facilities, with sometimes deadly consequences. Secretary McDonald said that disciplinary action has been taken against 5,600 employees and more firings are on the way. Drew Griffin discusses today's developments with Anderson.

The VA has begun the process of dismissing four high level officials, including one at the center of the 2012 outbreak of legionnaire's disease. It sickened 21 veterans in Pittsburgh and five later died. Drew Griffin tells Anderson that at the VA, "you go on a 'sort of' wait list to be fired."

A controversial new report on the VA facilities in Phoenix looked at more than 3,000 cases and found that dozens of veterans faced 'clinically significant' delays in care. The report also said investigators could not conclusively link their deaths to those delays.

A scathing report has just been released on the VA facilities in Phoenix. The study looked at more than 3,000 cases and found that dozens of veterans had quote 'clinically significant' delays in care, and six of them died. The report says investigators could not conclusively link their deaths to those delays. Senior Investigative Correspondent Drew Griffin broke this story and has been Keeping Them Honest from the beginning. He has been going through the report and its disturbing findings.

Following up a stunning report from Monday evening, on Tuesday Drew Griffin joined Anderson Cooper with an update on the alleged fraudulent record keeping at an Arizona VA hospital.

As the allegations have gained Congressional attention, the Senior Investigative Correspondent noted that action is being taken by the Department of Veterans Affairs. However, consequences are slow to come, especially at the top:

"We do know the VA has begun the termination process with some of the executives there...but [former Phoenix VA Health Care System administrator Sharon Helman] is getting paid."

On the heels of Senior Investigative Correspondent Drew Griffin's exclusive interview with an employee who says she was forced to cover up fraudulent records at an Arizona VA hospital, Congressman Jeff Miller joins Anderson Cooper with his reactions.

Calling the revelations "more than stunning," Miller surmises that the situation is not exclusive to Phoenix, but applauds Pauline DeWenter for summoning the courage to speak up amid altered death records of patients.

The Chairman of the House Veterans' Affairs Committee, Miller calls for accountability, and pledges to continue fighting for the rights of all vets.

(CNN) – Records of dead veterans were changed to hide how many people died while awaiting care at Phoenix VA hospital, whistle-blower tells CNN in stunning revelations that point to a new cover up in the ongoing VA scandal.

The allegation comes from the scheduling clerk who, for the better part of a year, says she was ordered to keep a secret waiting list in her desk drawer. Pauline DeWenter has never spoken publicly about any of it - until now.

After AC360 spent months reporting on the problems at VA hospitals across the country, VA Secretary Eric Shinseki is resigning. President Obama made the announcement today, saying Shinseki did not want to be a distraction. But there are serious questions about what it will take to get America's veterans the care they need and deserve. Drew Griffin takes a look at the events that led to today's resignation.

Anderson looked at what needs to be done to fix the problems at the VA with Congressman Jeff Miller who is the Chairman of the House Committee on Veterans Affairs and Dr. Sam Foote, who blew the whistle on problems at the Phoenix VA hospital.